freedroidrpg.appdata.xml is using a legacy version of the format and isn't 
installed in the correct directory anymore ; I'll try to provide a patch later.

Here is the promised patch ; there is an appstreamcli tool to check if the file 
is valid, and it seems happy with the result.

Thanks for the report and the work, we'll 
try to Ensure it is updated or at least 
reviewed by next week. =D

Due busy months it cannot be done in 
immediate.
Thanks 
Jesusalva

This diff could not be applied.
aka. EOF expected, got '<content_rating>'

===========================================
patching file pkgs/freedesktop/freedroidrpg.appdata.xml
Hunk #2 FAILED at 39.
1 out of 2 hunks FAILED -- saving rejects to file
pkgs/freedesktop/freedroidrpg.appdata.xml.rej

Reason detected to be missing and conflicting content_rating on diff file.
Check the last line of the diff.

==================================================
Also, about providing a "proper" patch, check
http://www.freedroid.org/dev-section/review-board/

It is much easier and faster to accept patches via Review Board (for example,
using RB and the instructions on that page, I could have returned to you 'by
next week'...)
Of course, if for some reason you are unable to make use of Review Board, please
let us know.

Also, for a definitive Ship It, you will need to wait for Fluzz, whom shall be
available before New Year.
I can only do checks to ensure that his work is the fastest possible (looking at
code >> make >> playtest/benchmark/does-it-run-on-my-PC >> commit)

Thanks for your work,
Jesusalva
Game Content

Fixed in commit 1b018d493